Adahan is a small representitive of the Mole Civilization. One day, when he was mining, he was captured and possessed by Greedy. Now, he is in a huge mining armour and attacks Ristar when he appears in the boss stage by drilling or lunging at him.

He will drill, shoot dust waves and claw you down.
After two to five hits, he will destroy the ground, causing Ristar to engage in a freefall battle with Adahan, where he must strike him to land on solid ground and continue the battle while also avoiding his lunges. On the bright side, the lunges can actually give you an advantage, as you can strike him and hit him if you aim carefully.
After six hits, Adahan's armour is removed, showing what he really looks like.
He will continue to attack using a smaller dust wave attack, which humorously gives no damage whatsoever. From there, one hit will be enough to take him down.